A seed screening device for wheat research

Abstract

The present invention discloses a seed screening device for wheat research, comprising a screening drum, a multi-precision screening aeration mechanism, an impact-type one-way screening mechanism, and a floating object mesh cage assembly. The screening drum is provided with an upper wall opening cavity, and the screening drum includes a screening chamber and a drive chamber from top to bottom. A sealing partition is provided between the screening chamber and the drive chamber, and a plurality of adjustment sliding holes are distributed on the sealing partition. The multi-precision screening aeration mechanism is provided in the drive chamber and the screening chamber, the impact-type one-way screening mechanism is provided in the screening chamber, and the floating object mesh cage assembly is slidably provided on the upper wall of the screening drum and the upper end of the impact-type one-way screening mechanism. The present invention belongs to the technical field of wheat seed research, and specifically provides a seed screening device for wheat research that utilizes aeration to generate turbulence, thereby driving accumulated wheat seeds to impact upward, and automatically screening them in layers. Through the reverse motion of the wheat seeds, the wheat seeds are sequentially graded from large to small, and the wheat seeds are screened efficiently and comprehensively.

Description

Technical Field

[0001] The invention belongs to the technical field of wheat seed research, and in particular relates to a seed screening device for wheat research. Background Art

[0002] The quality of wheat seeds directly affects the yield of wheat, so wheat seed selection is particularly important. It is necessary to screen out impurities, shriveled and inferior seeds, small-grained seeds and hollow seeds in the wheat seeds through water selection or air selection. The existing device screens out the above-mentioned inferior seeds that do not meet the quality standards together during screening, and it is difficult to screen out the wheat with small grains mixed in the inferior seeds. It is also necessary to screen out the inferior seeds that have been screened out, so as to screen out the good seeds with small grains for flour processing. The steps are very cumbersome, and the air selection cannot accurately screen the wheat seeds because the contact time between the wheat seeds and the air flow is relatively short.

[0003] Therefore, there is an urgent need for a seed screening device that can quickly and fully screen wheat seeds during screening. Summary of the Invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a seed screening equipment for wheat research that uses aeration to generate turbulence to drive the accumulated wheat seeds to impact upward and automatically screen them in layers. By making the wheat seeds move in the opposite direction from bottom to top, the wheat seeds are graded from large to small in sequence, thereby realizing efficient and comprehensive screening of wheat seeds.

[0005] At the same time, by adjusting the speed of the progressive movement of the multi-precision screening aeration mechanism, multi-level high-precision aeration screening treatment and low-precision rapid screening treatment of wheat seeds are realized. With the help of aeration treatment, the self-cleaning of the equipment is achieved, and a central discharge screening pipe is reserved to achieve the separation of large-particle hollow seeds. In addition, the full screening of wheat seeds is achieved in conjunction with multi-stage screening equipment.

[0006] The technical solution adopted by the present invention is as follows: The present invention provides a seed screening device for wheat research, comprising a screening cylinder, a multi-precision screening aeration mechanism, an impact-type unidirectional screening mechanism, and a floating object filter cloth assembly. The screening cylinder is provided with an open cavity on the upper wall. The screening cylinder includes a screening chamber and a drive chamber from top to bottom. A sealing partition is provided between the screening chamber and the drive chamber. A plurality of adjustment sliding holes are distributed on the sealing partition. The multi-precision screening aeration mechanism is provided in the drive chamber and the screening chamber. The impact-type unidirectional screening mechanism is provided in the screening chamber. The floating object filter cloth assembly is slidably provided on the upper wall of the screening cylinder and the upper end of the impact-type unidirectional screening mechanism.

[0007] The multi-precision screening aeration mechanism includes a precision adjustment drive assembly, an adjusting slide rod, an aeration assembly and multiple groups of precision adjustment rings coaxially distributed from the inside to the outside. The precision adjustment drive assembly is arranged in the driving cavity, the lower end of the adjusting slide rod is connected to the precision adjustment drive assembly, the upper end of the adjusting slide rod slides through the adjusting slide hole arranged in the screening cavity, and multiple groups of adjusting slide rods are slidingly provided on the sealing partition, and the multiple groups of precision adjustment rings are respectively arranged at the upper end of the adjusting slide rod, and an annular elastic connecting piece is provided between two adjacent groups of precision adjustment rings. The aeration assembly is arranged on the bottom wall and the upper wall of the multiple groups of precision adjustment rings, and the precision adjustment drive assembly drives the multiple groups of precision adjustment rings coaxially distributed from the inside to the outside to move up and down progressively through the adjusting slide rod, thereby driving the aeration assembly on the precision adjustment ring to gradually rise and fall from the inside to the outside. The higher the height of the aeration assembly, the greater the impact force generated on the top of the aeration assembly, and the longer the time, the finer the wheat seeds screened above the precision adjustment ring.

[0008] The precision adjustment drive assembly includes a driving shaft, a limiting collar and a turntable assembly. The driving shaft is rotatably arranged in a driving cavity. The turntable group is symmetrically arranged on the driving shaft. The turntable group includes multiple groups of eccentric turntables eccentrically fixed on the driving shaft and multiple groups of external linkage lifting disks rotatably sleeved on the outside of the eccentric turntables. The multiple groups of eccentric turntables are distributed in a spiral array on the driving shaft. There is an angle between two adjacent groups of eccentric turntables. A rotating through hole is provided on the external linkage lifting disk. The eccentric rotation card It is connected in the rotating through hole, and the lower end of the adjusting slide rod is rotatably connected with the external linkage lifting disk. The limiting collar is arranged on the driving shaft. The limiting collar is symmetrically arranged on both sides of each group of eccentric turntables. The limiting collar limits the eccentric turntables. When the driving shaft rotates, it drives multiple groups of eccentric turntables to rotate synchronously. When the eccentric turntables rotate, the adjusting slide rod is driven up and down through the external linkage lifting disk. The multiple groups of adjusting slide rods are driven to rise and fall in turn through the multiple groups of eccentric turntables distributed in a spiral array, thereby driving the multiple groups of precision adjustment rings to move in a circular wave.

[0009] Furthermore, the aeration assembly includes an aeration head and an aeration pipe, the aeration heads are circumferentially distributed on the precision adjustment ring, the aeration pipes are arranged on the bottom wall of the precision adjustment ring, and each group of precision adjustment rings has a group of aeration pipes on the bottom wall. The bottom wall of the screening chamber is provided with an air supply main pipe, and air supply hoses are respectively connected between the air supply main pipe and the aeration pipe. An air supply mechanism is provided on one side of the screening cylinder, and the air supply mechanism is connected to the air supply main pipe. The air supply mechanism adopts an air compressor, and the air supply mechanism supplies air to each group of aeration pipes through the air supply main pipe and the air supply hose, and then fully aerates the liquid in the screening chamber through the aeration heads on each group of precision adjustment rings, thereby driving the wheat seeds at the bottom to move upward and generating pressure on the impact-type one-way screening mechanism.

[0010] Furthermore, a speed regulating motor is provided on the outer wall of the screening drum, which is fixed on the outer wall of the screening drum through its own bracket. The output shaft of the speed regulating motor is connected to the driving shaft, and the speed regulating motor drives the driving shaft to rotate.

[0011] In order to ensure the sealing of the driving chamber, a sealing ring is provided at the adjusting sliding hole to prevent water in the screening chamber from leaking into the driving chamber.

[0012] Among them, the impact-type one-way screening mechanism includes a screening plate, a duckbill valve and a filter screen. The screening plate is coaxially arranged in the screening chamber, and the screening plate is conically arranged. The screening plate is evenly spaced with filter holes, and the filter screen is tightly fitted below the filter holes. The duckbill valve is connected above the filter holes. The aeration head fully aerates the water in the screening cylinder below the screening plate, thereby driving the water flow below the screening plate to generate pressure on the duckbill valve, so that the duckbill valve opens and drives the wheat seeds to move upward with the water flow and fully contact the filter screen. Seeds smaller than the diameter of the filter screen pores flow through the filter screen and the duckbill valve and move up to the top of the screening plate. Large-grained and superior seeds larger than the diameter of the filter screen pores are screened below the screening plate. The duckbill valve can effectively prevent small-grain wheat seeds from sinking. When the aeration head stops aerating, the duckbill valve automatically closes.

[0013] Furthermore, the inner wall of the screening cavity is provided with an internal thread, and the side wall of the screening plate is provided with an external thread. The screening plate is threadedly connected to the screening cavity, which is convenient for disassembly and cleaning.

[0014] Furthermore, a central material discharge screening pipe is provided through the middle of the screening plate, and the central material discharge screening pipe is connected from top to bottom. The central material discharge screening pipe is convenient for material discharge and also facilitates the floating of bad seeds and hollow seeds in large-grain wheat seeds.

[0015] The cam is secured to the bottom of the filter element and is easily removable from the filter bag and is easily broken or smeared.

[0016] Preferably, a middle connecting rod is provided on the outer U-shaped portion, and the middle connecting rod conveniently drives the support member to rotate along the central discharge screening pipe and the screening drum to control the expansion and folding of the filter cloth.

[0017] Furthermore, the side wall of the screening chamber is connected to a discharge pipe, the discharge pipe is provided with a discharge valve, the discharge pipe is arranged below the screening plate, the discharge pipe is convenient for discharging large particles after screening, the side wall of the bottom end of the screening chamber is connected to a drainage through-hole, a drainage filter cloth is provided at the drainage through-hole, a drainage pipe is connected to the drainage through-hole, and a drainage valve is provided on the drainage pipe to facilitate the discharge of water inside the screening chamber.

[0018] Preferably, the screening disc is coaxially fixed with an annular shielding portion, which is convenient for blocking small-particle wheat seeds.

[0019] The beneficial effects achieved by the present invention using the above structure are as follows: This scheme provides a seed screening device for wheat research, which uses aeration to generate turbulence to drive the accumulated wheat seeds to impact upward, and automatically screens the wheat seeds in layers. The reverse movement of the wheat seeds from bottom to top realizes the sequential grading of the wheat seeds from large to small, and realizes the efficient and comprehensive screening of the wheat seeds.

[0020] Secondly, the circular waves that periodically move from the inside to the outside formed by the multi-precision screening aeration mechanism can easily drive the wheat seeds to move and prevent them from piling up, and drive the aeration head to rise from the inside to the outside in sequence, thereby performing all-round screening of wheat seeds in different areas, and at the same time, it can also realize the rapid discharge of the screened seeds.

[0021] Furthermore, by adjusting the speed of the progressive movement of the multi-precision screening aeration mechanism, multi-level high-precision aeration screening and low-precision rapid screening of wheat seeds are achieved. A central discharge screening tube is reserved to separate large-particle hollow seeds, and full screening of wheat seeds is achieved in conjunction with multi-stage screening equipment.

[0022] Finally, in this solution, aeration treatment is used to achieve self-cleaning of the equipment. After screening, clean water is re-injected and the aeration head and speed control motor are turned on to achieve self-cleaning of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a seed screening device for wheat research provided by the present invention;

[0024] Figure 2 A cross-sectional view of a seed screening device for wheat research provided by the present invention;

[0025] Figure 3 A half-section view of a seed screening device for wheat research provided by the present invention;

[0026] Figure 4 A cross-sectional view of the multi-precision screening aeration mechanism provided by the present invention;

[0027] Figure 5 A schematic structural diagram of the multi-precision screening aeration mechanism provided by the present invention;

[0028] Figure 6 A schematic diagram of the three-dimensional structure of the multi-precision screening aeration mechanism provided by the present invention;

[0029] Figure 7 A schematic structural diagram of the impact-type one-way screening mechanism provided by the present invention;

[0030] Figure 8 A schematic diagram of the three-dimensional structure of the impact-type one-way screening mechanism provided by the present invention;

[0031] Figure 9 A cross-sectional view of the impact-type one-way screening mechanism provided by the present invention;

[0032] Figure 10 A schematic structural diagram of a floating object filter cloth assembly provided by the present invention;

[0033] Figure 11 This is a schematic structural diagram of the support member provided by the present invention.

[0034] Among them, 1. screening cylinder, 2. multi-precision screening aeration mechanism, 3. impact one-way screening mechanism, 4. floating filter cloth assembly, 5. screening chamber, 6. driving chamber, 7. sealing partition, 8. adjusting slide hole, 9. sealing ring, 10. discharge pipe, 11. discharge valve, 12. drainage through hole, 13. drainage filter cloth, 14. drainage pipe, 15. drainage valve, 201. precision adjustment drive assembly, 202. adjusting slide rod, 203. aeration assembly, 204. precision adjustment ring, 205. elastic connector, 206. air supply mechanism, 207. speed regulating motor, 2011. driving shaft, 2012. limiting collar, 2013. turntable assembly Parts, 2014, eccentric turntable, 2015, external linkage lifting plate, 2016, rotating through hole, 2031, aeration head, 2032, aeration pipe, 2033, air supply main pipe, 2034, air supply hose, 301, screening plate, 302, duckbill valve, 303, filter screen, 304, filter through hole, 305, internal thread, 306, external thread, 307, center discharge screening pipe, 308, shielding part, 401, filter cloth, 402, support part, 4011, small particle filter cloth, 4012, large particle filter cloth, 4021, outer U-shaped part, 4022, inner U-shaped part, 4023, clamping part, 4024, middle connecting rod.

[0035] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0038] like Figure 1-Figure 4As shown, the present invention provides a seed screening device for wheat research, including a screening cylinder 1, a multi-precision screening aeration mechanism 2, an impact-type one-way screening mechanism 3 and a floating object filter cloth 401 component 4. The screening cylinder 1 is a cavity with an upper wall opening. The screening cylinder 1 includes a screening chamber 5 and a driving chamber 6 from top to bottom. A sealing partition 7 is provided between the screening chamber 5 and the driving chamber 6. A plurality of adjustment sliding holes 8 are distributed on the sealing partition 7. The multi-precision screening aeration mechanism 2 is provided in the driving chamber 6 and the screening chamber 5. The impact-type one-way screening mechanism 3 is provided in the screening chamber 5. The floating object filter cloth 401 component 4 is slidingly provided. On the upper wall of the screening cylinder 1 and the upper end of the impact-type one-way screening mechanism 3; the multi-precision screening aeration mechanism 2 includes a precision adjustment drive component 201, an adjustment slide 202, an aeration component 203 and multiple groups of precision adjustment rings 204 coaxially distributed from the inside to the outside, the precision adjustment drive component 201 is arranged in the drive cavity 6, the lower end of the adjustment slide 202 is connected to the precision adjustment drive component 201, the upper end of the adjustment slide 202 slides through the adjustment slide hole 8 provided in the screening cavity 5, and multiple groups of adjustment slides 202 are slidably provided on the sealing partition 7, and multiple groups of precision adjustment rings 204 are respectively provided on the adjustment slide 20 2, an annular elastic connector 205 is provided between two adjacent groups of precision adjustment rings 204, and the aeration components 203 are provided on the bottom wall and the upper wall of the multiple groups of precision adjustment rings 204. The precision adjustment driving component 201 drives the multiple groups of precision adjustment rings 204 coaxially distributed from the inside to the outside to move up and down gradually by adjusting the slide bar 202, thereby driving the aeration components 203 on the precision adjustment rings 204 to gradually rise and fall from the inside to the outside. The higher the height of the aeration component 203, the greater the impact force generated on the top of the aeration component 203, and the longer the time, the more accurate the wheat seeds screening above the precision adjustment ring 204. Fine; in order to ensure the sealing of the driving chamber 6, a sealing ring 9 is provided at the adjusting slide hole 8 to prevent the water in the screening chamber 5 from leaking into the driving chamber 6; the side wall of the screening chamber 5 is connected to a discharge pipe 10, and the discharge pipe 10 is provided with a discharge valve 11. The discharge pipe 10 is arranged below the screening plate 301, and the discharge pipe 10 is convenient for discharging large particles after screening. The bottom side wall of the screening chamber 5 is connected to a drainage through hole 12, and a drainage filter cloth 40113 is provided at the drainage through hole 12. The drainage through hole 12 is connected to a drainage pipe 14, and a drainage valve 15 is provided on the drainage pipe 14 to facilitate the discharge of water inside the screening chamber 5.

[0039] like Figure 4-Figure 6As shown, the precision adjustment drive assembly 201 includes a driving shaft 2011, a limiting collar 2012 and a turntable assembly 2013. The driving shaft 2011 is rotatably arranged in the driving cavity 6. The turntable group is symmetrically arranged on the driving shaft 2011. The turntable group includes multiple groups of eccentric turntables 2014 eccentrically fixedly arranged on the driving shaft 2011 and multiple groups of external linkage lifting plates 2015 rotatably sleeved on the outside of the eccentric turntables 2014. The multiple groups of eccentric turntables 2014 are distributed in a spiral array on the driving shaft 2011. There is an angle between two adjacent groups of eccentric turntables 2014. The external linkage lifting plate 2015 is provided with a rotating through hole 2 016, the eccentric rotating card is arranged in the rotating through hole 2016, the lower end of the adjusting slide 202 is rotatably connected with the external linkage lifting plate 2015, the limiting collar 2012 is arranged on the driving shaft 2011, and the limiting collar 2012 is symmetrically arranged on both sides of each group of the eccentric rotating discs 2014. The limiting collar 2012 limits the eccentric rotating discs 2014. When the driving shaft 2011 rotates, it drives multiple groups of eccentric rotating discs 2014 to rotate synchronously. When the eccentric rotating discs 2014 rotate, the adjusting slide 202 is driven up and down by the external linkage lifting plate 2015, and the multiple groups of adjusting slides 2014 distributed in a spiral array are driven by multiple groups of eccentric rotating discs 2014. 2 rises and falls in sequence, thereby driving multiple groups of precision adjustment rings 204 to move in annular waves; the aeration assembly 203 includes an aeration head 2031 and an aeration pipe 2032, the aeration head 2031 is circumferentially distributed on the precision adjustment ring 204, the aeration pipe 2032 is arranged on the bottom wall of the precision adjustment ring 204, and each group of precision adjustment rings 204 is provided with a group of aeration pipes 2032 on the bottom wall, the bottom wall of the screening chamber 5 is provided with an air supply main 2033, and an air supply hose 2034 is respectively connected between the air supply main 2033 and the aeration pipe 2032, and an air supply mechanism 206 is provided on one side of the screening cylinder 1, and the air supply mechanism 206 is connected to the air supply main 2033. In addition, the air supply mechanism 206 adopts an air compressor, and the air supply mechanism 206 supplies air to each group of aeration pipes 2032 through the air supply main pipe 2033 and the air supply hose 2034, and then fully aerates the liquid in the screening chamber 5 through the aeration head 2031 on each group of precision adjustment rings 204, thereby driving the wheat seeds at the bottom to move upward and generating pressure on the impact-type one-way screening mechanism 3; a speed regulating motor 207 is provided on the outer wall of the screening cylinder 1, and the speed regulating motor 207 is fixed to the outer wall of the screening cylinder 1 through its own bracket, and the output shaft of the speed regulating motor 207 is connected to the driving shaft 2011, and the speed regulating motor 207 drives the driving shaft 2011 to rotate.

[0040] like Figure 7-Figure 9As shown, the impact-type one-way screening mechanism 3 includes a screening plate 301, a duckbill valve 302 and a filter screen 303. The screening plate 301 is coaxially arranged in the screening chamber 5, and the screening plate 301 is conical. The screening plate 301 is evenly spaced with filter holes 304, and the filter screen 303 is tightly fitted below the filter holes 304. The duckbill valve 302 is connected above the filter holes 304, and the aeration head 2031 fully aerates the water in the screening cylinder 1 below the screening plate 301, thereby driving the water flow below the screening plate 301 to generate pressure on the duckbill valve 302, so that the duckbill valve 302 opens, and drives the wheat seeds to move upward with the water flow and fully contact the filter screen 303. The seeds smaller than the filter hole diameter of the filter screen 303 flow through the filter screen 303 and move upward through the duckbill valve 302. Above the screening plate 301, large-grained high-quality seeds larger than the filter hole diameter of the filter screen 303 are screened below the screening plate 301. The duckbill valve 302 can effectively prevent small-grain wheat seeds from sinking. When the aeration head 2031 stops aeration, the duckbill valve 302 automatically closes; the inner wall of the screening chamber 5 is provided with an internal thread 305, and the side wall of the screening plate 301 is provided with an external thread 306. The screening plate 301 is threadedly connected to the screening chamber 5, which is convenient for disassembly and cleaning; a central discharge screening pipe 307 is provided through the middle of the screening plate 301, and the central discharge screening pipe 307 is passed through from top to bottom. The central discharge screening pipe 307 is convenient for discharge, and also facilitates the floating of bad seeds and hollow seeds among large-grain wheat seeds; the screening plate 301 is coaxially fixed with a ring-shaped shielding portion 308, which is convenient for blocking small-grain wheat seeds.

[0041] See Figure 1 、 Figure 10 and Figure 11, the floating filter cloth 401 assembly 4 is arranged at the upper end of the central material discharge screening pipe 307 and the upper end of the screening cylinder 1, the floating filter cloth 401 assembly 4 includes a filter cloth 401 and a support member 402 provided at both ends of the filter cloth 401, the support member 402 includes an outer U-shaped portion 4021, an inner U-shaped portion 4022 and a clamping portion 4023, the clamping portion 4023 is symmetrically provided at both ends of the outer U-shaped portion 4021, the inner U-shaped portion 4022 is provided on the side of the outer U-shaped portion 4021 close to the central material discharge screening pipe 307 through the clamping portion 4023, the clamping portion 4023 is provided in an inverted U shape, the clamping portion 4023 is respectively clamped to the upper wall edge of the screening cylinder 1 and the upper edge of the central material discharge screening pipe 307, the inner U-shaped portion 4022 is provided at the central material discharge screening Inside the tube 307, the outer U-shaped portion 4021 is arranged between the central discharge screening tube 307 and the screening drum 1. The filter cloth 401 includes a small particle filter cloth 4011 and a large particle filter cloth 4012. The small particle filter cloth 4011 is arranged between the outer U-shaped portion 4021, and the large particle filter cloth 4012 is arranged between the inner U-shaped portion 4022. In the initial state, the filter cloth 401 is in a folded state. When the screening is completed, the support members 402 on both sides of the filter cloth 401 are rotated to make the filter cloth 401 unfold into a ring shape, so that the bad seeds floating on the water surface can be collected; the outer U-shaped portion 4021 is provided with a middle connecting rod 4024, which conveniently drives the support members 402 to rotate along the central discharge screening tube 307 and the screening drum 1 to control the unfolding and folding of the filter cloth 401.

[0042] During specific use, water is poured into the screening chamber 5 and the liquid level is much higher than the screening plate 301. The wheat seeds to be screened are poured into the bottom of the screening plate 301 through the central discharge screening tube 307. In the initial state, the multiple groups of precision adjustment rings 204 are set in a conical shape with a high middle and low surroundings. At this time, the wheat seeds slide down along the multiple groups of precision adjustment rings 204 in sequence, and the air supply mechanism 206 and the speed regulating motor 207 are started. The speed regulating motor 207 is set to rotate slowly. The air supply mechanism 206 supplies air to each group of aeration pipes 2032 through the air supply main pipe 2033 and the air supply hose 2034, and then the liquid in the screening chamber 5 is fully aerated through the aeration head 2031 on each group of precision adjustment rings 204. Under the action of the aeration head 2031, the water flow drives the wheat seeds upward. The duckbill valve 302 moves and generates pressure on the duckbill valve 302 to open the duckbill valve 302. At the same time, the speed regulating motor 207 drives the driving shaft to rotate slowly. When the driving shaft 2011 rotates, it drives multiple sets of eccentric turntables 2014 to rotate synchronously. When the eccentric turntable 2014 rotates, it drives the adjusting slide bar 202 to move up and down through the external linkage lifting plate 2015. The eccentric turntables 2014 distributed in a spiral array drive the multiple sets of adjusting slide bars 202 to rise and fall from the inside to the outside in sequence, thereby driving the multiple sets of precision adjustment rings 204 to move in a circular wave. The wave crests of the multiple sets of precision adjustment rings 204 move from the inside to the outside. The aeration head 2031 on the precision adjustment ring 204 at the wave crest pushes the wheat seeds to move up, and the upward movement distance of the wheat seeds above the wave crest becomes larger accordingly. The higher the height of 3, the greater the impact force generated on the top of the aeration component 203, and the longer the time, the finer the screening of the wheat seeds above the precision adjustment ring 204, and the finer the screening of the wheat seeds from the inside to the outside. At the same time, the precision adjustment ring 204 that continuously and periodically moves in annular waves will also drive the wheat seeds to circulate in the screening chamber 5 from the inside to the outside. The aeration head 2031 uses aeration to generate turbulence, thereby driving the accumulated wheat seeds to impact upward, and the seeds smaller than the filter hole diameter of the filter 303 flow through the filter 303 and the duckbill valve 302 with the water and move to the top of the screening plate 301, and the large-grained and superior seeds larger than the filter hole diameter of the filter 303 are screened below the screening plate 301. When the wheat seeds are screened, the aeration head 2031 is closed and the adjustment is closed. The motor 207 is turned on. When the aeration head 2031 stops aeration, the duckbill valve 302 is automatically closed. The duckbill valve 302 can effectively prevent small-grain wheat seeds from sinking. The water in the screening chamber 5 gradually becomes still. Impurities in the small-grain wheat seeds and shriveled and low-quality seeds float to the water surface under the action of buoyancy, while small-grain wheat seeds with good quality sink above the screening plate 301. Large-grain impurities and hollow bad seeds in the large-grain wheat seeds float to the water surface along the central discharge screening pipe 307 under the action of buoyancy. At this time, the staff moves the support members 402 on both sides of the filter cloth 401 along the screening cylinder 1 and the central discharge screening pipe 307, thereby driving the filter cloth 401 to unfold and placing the impurities and bad seeds floating on the water surface on the small-grain filter cloth 4011 and the large-grain filter cloth 4012.Then, remove the floating material filter cloth 401 assembly 4 from the upper end of the screening drum 1. Open the drain valve 15, allowing the water in the screening chamber 5 to drain through the drain pipe 14. After the water in the screening chamber 5 is completely drained, the central discharge screening pipe 307 drives the screening disc 301 to rotate, thereby screwing the screening disc 301 out of the screening chamber 5, and the small grains of wheat seeds on the screening disc 301 can be removed. Then, turn on the speed regulating motor 207 and the discharge valve 11. The speed regulating motor 207 drives the peaks of the ring waves formed by the multiple sets of precision adjustment rings 204 to move from the inside to the outside, thereby driving the large grains of wheat seeds screened by the multiple sets of precision adjustment rings 204 to move from the inside to the outside, and finally discharged through the discharge pipe 10.

[0043] In some embodiments, the staff can adjust the speed regulating motor 207 to a fast state, and the speed regulating motor 207 drives the drive shaft to rotate rapidly, thereby driving the peaks of the annular waves formed by the multiple sets of precision adjustment rings 204 to move from the inside to the outside at a fast periodic rate, thereby driving the wheat seeds at the bottom of the screening plate 301 to move rapidly and directionlessly. At this time, the wheat seeds above the screening plate 301 move up and down rapidly for coarse precision screening.

[0044] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

[0046] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A seed screening device for wheat research, characterized by: It includes a screening cylinder, a multi-precision screening aeration mechanism, an impact-type one-way screening mechanism and a floating object filter cloth assembly. The screening cylinder is provided with an upper wall opening cavity. The screening cylinder includes a screening cavity and a driving cavity from top to bottom. A sealing partition is provided between the screening cavity and the driving cavity. A plurality of adjustment sliding holes are distributed on the sealing partition. The multi-precision screening aeration mechanism is provided in the driving cavity and the screening cavity. The impact-type one-way screening mechanism is provided in the screening cavity. The floating object filter cloth assembly is slidably provided on the upper wall of the screening cylinder and the upper end of the impact-type one-way screening mechanism. The multi-precision screening aeration mechanism The air mechanism includes a precision adjustment drive assembly, an adjustment slide rod, an aeration assembly, and multiple groups of precision adjustment rings coaxially distributed from the inside to the outside. The precision adjustment drive assembly is arranged in the drive cavity. The lower end of the adjustment slide rod is connected to the precision adjustment drive assembly. The upper end of the adjustment slide rod slides through the adjustment slide hole arranged in the screening cavity. Multiple groups of adjustment slide rods are slidably provided on the sealing partition. Multiple groups of precision adjustment rings are respectively provided on the upper ends of the adjustment slide rods. An annular elastic connector is provided between two adjacent groups of precision adjustment rings. The aeration assembly is provided on the bottom wall and the upper wall of the multiple groups of precision adjustment rings. The impact-type one-way screening mechanism includes a screening plate, a duckbill valve and a filter screen. The screening plate is coaxially arranged in the screening chamber, and the screening plate is conical. The screening plate is provided with filter holes at equal intervals. The filter screen is tightly fitted below the filter holes, and the duckbill valve is connected above the filter holes.

2. The wheat seed screening device for research according to claim 1, characterized in that: The aeration assembly includes an aeration head and an aeration pipe. The aeration heads are circumferentially distributed on the precision adjustment ring. The aeration pipes are arranged on the bottom wall of the precision adjustment ring. Each group of precision adjustment rings is provided with a group of aeration pipes on the bottom wall. The bottom wall of the screening chamber is provided with an air supply main pipe. Air supply hoses are respectively connected between the air supply main pipe and the aeration pipe. An air supply mechanism is provided on one side of the screening cylinder, and the air supply mechanism is connected to the air supply main pipe.

3. The seed screening device for wheat research according to claim 2, characterized in that: The precision adjustment drive assembly includes a driving shaft, a limiting collar and a turntable assembly. The driving shaft is rotatably arranged in the driving cavity, and the turntable group is symmetrically arranged on the driving shaft. The turntable group includes multiple groups of eccentric turntables eccentrically fixedly connected to the driving shaft and multiple groups of external linkage lifting plates rotatably sleeved on the outer sides of the eccentric turntables. The multiple groups of eccentric turntables are distributed in a spiral array on the driving shaft, and there is an angle between two adjacent groups of eccentric turntables. The external linkage lifting plate is provided with a rotating through hole, and the eccentric rotation is rotatably clamped in the rotating through hole. The lower end of the adjusting slide rod is rotatably connected to the external linkage lifting plate, and the limiting collar is arranged on the driving shaft. The limiting collar is symmetrically arranged on both sides of each group of eccentric turntables.

4. The wheat seed screening device for research according to claim 3, characterized in that: A speed regulating motor is provided on the outer wall of the screening drum. The speed regulating motor is fixed on the outer wall of the screening drum through a bracket provided therewith. The output shaft of the speed regulating motor is connected to the driving shaft.

5. The seed screening device for wheat research according to claim 4, characterized in that: The inner wall of the screening cavity is provided with an internal thread, the side wall of the screening plate is provided with an external thread, and the screening plate is threadedly connected to the screening cavity.

6. The wheat seed screening device for research according to claim 5, characterized in that: A central material discharge screening pipe is provided through the middle of the screening plate, and the central material discharge screening pipe is passed through from top to bottom.

7. The seed screening device for wheat research according to claim 6, characterized in that: The floating filter cloth assembly is arranged at the upper end of the central discharge screening tube and the upper end of the screening cylinder. The floating filter cloth assembly includes a filter cloth and support members provided at both ends of the filter cloth. The support member includes an outer U-shaped portion, an inner U-shaped portion and a clamping portion. The clamping portion is symmetrically arranged at both ends of the outer U-shaped portion, and the inner U-shaped portion is arranged on the side of the outer U-shaped portion close to the central discharge screening tube through the clamping portion. The clamping portion is arranged in an inverted U shape, and the clamping portion is respectively clamped to the upper wall edge of the screening cylinder and the upper edge of the central discharge screening tube. The inner U-shaped portion is arranged in the central discharge screening tube, and the outer U-shaped portion is arranged between the central discharge screening tube and the screening cylinder. The filter cloth includes small particle filter cloth and large particle filter cloth. The small particle filter cloth is arranged between the outer U-shaped portions, and the large particle filter cloth is arranged between the inner U-shaped portions.

8. The seed screening device for wheat research according to claim 7, characterized in that: The side wall of the screening chamber is connected to a discharge pipe, the discharge pipe is provided with a discharge valve, the discharge pipe is arranged below the screening plate, the bottom side wall of the screening chamber is connected to a drainage hole, a drainage filter cloth is provided at the drainage hole, a drainage pipe is connected to the drainage hole, and a drainage valve is provided on the drainage pipe.

9. The seed screening device for wheat research according to claim 8, characterized in that: The screening disc is coaxially fixed with an annular shielding portion.

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